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<head>
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    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

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        integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

    <title>Bootstrap 框架练习</title>
    <style>
        .container div {
            border: 1px cadetblue solid;
            margin-bottom: 10px;
        }

    </style>
</head>

<body>
    <div class="container">
        <h1>Bootstrap 框架练习</h1>
    </div>
    <div class="container-fluid">
        <h1>Bootstrap 框架练习</h1>
    </div>
    <div class="container">
        <div class="row">
            <div class="col-sm">
                One of three columns
            </div>
            <div class="col-sm">
                One of three columns
            </div>
            <div class="col-sm">
                One of three columns
            </div>
            <div class="col-sm">
                One of three columns
            </div>
        </div>
    </div>
    <div class="container">
        <div class="row">
            <div class="col">
                One of three columns
            </div>
            <div class="col">
                One of three columns
            </div>
            <div class="col">
                One of three columns
            </div>
            <div class="col">
                One of three columns
            </div>
        </div>
    </div>
    <div class="container">
        <div class="row">
            <div class="col">
                1 of 3
            </div>
            <div class="col-6">
                2 of 3 (wider)
            </div>
            <div class="col">
                3 of 3
            </div>
        </div>
        <div class="row">
            <div class="col">
                1 of 3
            </div>
            <div class="col-5">
                2 of 3 (wider)
            </div>
            <div class="col">
                3 of 3
            </div>

        </div>
        <div class="row">
            <div class="col-sm-8">col-sm-8</div>
            <div class="col-sm-4">col-sm-4</div>
        </div>
        <div class="row">
            <div class="col-md-4">.col-md-4</div>
            <div class="col-md-4 offset-md-4">.col-md-4 .offset-md-4</div>
        </div>
    </div>


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        crossorigin="anonymous"></script>
</body>

</html>
